NEOTEL are a bunch of ******s!

Neotel are a bunch of ******s! I had only realised recently that they are still debiting my account even after I had asked for my service to be cancelled almost a year go! My contract originally expired in 2011. They have ben debiting my account ever since then without my permission!!! I phoned in their call centre and spoke to Lufuno. What a memorable experience that was...firstly she couldn't even speak English properly, secondly she could not help me with any of my questions, and thirdly she had a bad attitude. I spoke to her manager few days later. This person called Lindiwe, who promptly informed me that it will take 21 days to process a cancellation. Why? What are they doing? I will never recommend this company and their service to anybody! How can they keep debiting my account without any written authorisation from me to do so?